Climate change extreme and seasonal toxic metal occurrence in Romanian freshwaters in the last two decades—case study and critical review

Iordache, Mihaela; Nechita, Constantin; Voica, Cezara; Pluháček, Tomáš; Schug, Kevin A.

doi:10.1038/s41545-021-00147-w

Cited by 29 publications

(13 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the last years, various studies indicated severe pollution in multiple environments caused by intensive industrialization, mining, agricultural practices, and poor management of city waste in Romania [46], which increased the susceptibility of foodstuff affected by pollution [47]. Even if lead did not exceed the recommended limit, it had high concentrations in all essential oils, especially in Mentha × pipperita L., reaching a maximum in the M6 sample with plant origins in Romania (Table 1).…”

Section: Discussionmentioning

confidence: 99%

Assessing the Health Risk and the Metal Content of Thirty-Four Plant Essential Oils Using the ICP-MS Technique

et al. 2022

Self Cite

View full text Add to dashboard Cite

Natural ecosystems are polluted with various contaminants, and among these heavy metals raise concerns due to their side effects on both environment and human health. An investigation was conducted on essential oil samples, comparing similar products between seven producers, and the results indicated a wide variation of metal content. The recommended limits imposed by European Union regulations for medicinal plants are exceeded only in Mentha × pipperita (Adams, 0.61 mg/kg). Except for Thymus vulgaris, the multivariate analysis showed a strong correlation between toxic and microelements (p < 0.001). We verified plant species–specific bioaccumulation patterns with non-metric multidimensional scaling analysis. The model showed that Adams, Doterra, Hypericum, and Steaua Divina essential oils originated from plants containing high micro and macroelement (Cu, Mn, Mg, Na) levels. We noted that the cancer risk values for Ni were the highest (2.02 × 10−9–7.89 × 10−7). Based on the target hazard quotient, three groups of elements were associated with a possible risk to human health, including As, Hg, and Cd in the first group, Cr, Mn, Ni, and Co in the second, and Zn and Al in the third. Additionally, the challenge of coupling inter-element relationships through a network plot analysis shows a considerable probability of associating toxic metals with micronutrients, which can address cumulative risks for human consumers.

show abstract

Section: Discussionmentioning

confidence: 99%

Assessing the Health Risk and the Metal Content of Thirty-Four Plant Essential Oils Using the ICP-MS Technique

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…Other authors observed an increase in the frequency of extreme events regulated by the elevation, lower at high altitudes than in the plain [50], frequently intercorrelated with the atmospheric circulation pattern [51]. Frequently discussed in the literature are drought-triggered decline in forest growth and productivity [52], climatic events responsible for flash floods [53,54], or disfunction between physiological and functional processes at various levels in the ecosystems [55]. Severe drought caused lagged effects on trees physiology with post-drought dysfunction of carbon assimilation associated with die-off events [56] Frequently discussed in the literature are drought-triggered decline in forest growth and productivity [52], climatic events responsible for flash floods [53,54], or disfunction between physiological and functional processes at various levels in the ecosystems [55].…”

Section: Climate Datamentioning

confidence: 98%

“…Frequently discussed in the literature are drought-triggered decline in forest growth and productivity [52], climatic events responsible for flash floods [53,54], or disfunction between physiological and functional processes at various levels in the ecosystems [55]. Severe drought caused lagged effects on trees physiology with post-drought dysfunction of carbon assimilation associated with die-off events [56] Frequently discussed in the literature are drought-triggered decline in forest growth and productivity [52], climatic events responsible for flash floods [53,54], or disfunction between physiological and functional processes at various levels in the ecosystems [55]. Severe drought caused lagged effects on trees physiology with post-drought dysfunction of carbon assimilation associated with die-off events [56].…”

Section: Climate Datamentioning

confidence: 99%

A Tree Ring Proxy Evaluation of Declining Causes in Pinus sylvestris L. and Pinus nigra J.F. Arnold in Northeastern Romania

Nechita

Iordache

Costinel

et al. 2022

Forests

Self Cite

View full text Add to dashboard Cite

Drought-induced dieback has been extensively studied in various forests habitats. We used a retrospective tree ring width (TRW), basal area increment (BAI), oxygen isotope ratios in tree ring cellulose (δ18OTR) and carbon isotope ratios in tree ring cellulose (δ13CTR) to assess causes in declining Pinus sylvestris L. and Pinus nigra J.F. Arnold. The climate data analysis indicates a significant increased trend occurred after 1980 in minimum, mean and maximum temperature and a reduced amount of precipitation compared to the 1920–1980-time scale. According to the Palmer Drought Severity Index, we found two extreme drought years (1946 and 2000) and three years with severe drought (1990, 2003 and 2012). One-way ANOVA indicated no significant difference between P. nigra and P sylvestris tree ring width, basal area increment, but a considerable difference between δ13CTR and δ18OTR. Basal area increment evaluated the climate-growth relationship most accurately, comparing to δ18OTR and δ13CTR, which explained the influences of environmental factors in tree rings formation. The δ13CTR was mainly negatively correlated with high temperatures from April-August current growing seasons. The negative correlation between δ13CTR and NDVI indices (June, August) shows a decreased carbon uptake induced by drought from summer to early autumn. The low δ18OTR signal was associated with a complex of factors, including the strong influence of heavy precipitation occurring in the growing season and a weak reaction of declined trees to resources. Species-specific responses to drought in 1990, 2003 and 2012 indicated P. sylvestris as more sensitive to drought whit higher demand for water supply in the optimal compared with P. nigra. Weak and unstable correlations in time with increasing/decreasing values in drought periods were obtained more accurately using δ18OTR compared to δ13CTR. The species-specific resilience response to drought years showed a weak resilience and resistance in P. sylvestris occurred more evident after the 2012 event compared to less sensitive P. nigra trees. Decision-makers can use presented results to reinforce specific management plans capable of protecting and changing local compositions where is the case with species more resistant to drouth.

show abstract

“…Historically, there have been reports of heavy metals in drinking water covering their types and amounts, as well as origins, human exposure, hazard, and distance. Despite enormous progress, research is still needed to obtain clean drinking water [6]. Due to their limited economic capacity, many low-and middle-income countries are particularly concerned about the problem of reducing small numbers of heavy metals below the proposed limits [7].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Heavy Metals in Drinking Water of Tribal Districts Ex-FATA Pakistan

Ullah¹,

Suleman

Fazal

et al. 2022

JCE

View full text Add to dashboard Cite

This study was conducted to evaluate the six heavy metals zinc (Zn), iron (Fe), copper (Cu), nickel (Ni), chromium (Cr), and cadmium (Cd) in seven water samples collected from seven tribal districts (Bajaur, Mohmand, Khyber, Orakzai, Kurram, South Waziristan and North Waziristan) from Ex-FATA Pakistan. All samples were digested using the wet digestion method and the digested samples were analyzed for heavy metals using an atomic absorption spectrophotometer. Results from water samples from seven districts were compared to the recommended standard value from the World Health Organization and the Environmental Protection Agency. The results obtained from the analysis for nickel (Ni) showed that the highest concentration (0.093 mg/l) was reported in the water of Khyber district, while the lowest concentration (0.011 mg/l) was found in the water of South Orakzai district. Iron (Fe) had the highest concentration (0.32 mg/l) in the water of Orakzai district. The highest concentration (0.19 mg/L) of chromium (Cr) was reported in the water of Orakzai district. In addition, the result showed that the highest concentration (0.87 mg/l) of zinc (Zn) was in Orakzai district, the highest concentration (1.92 mg/l) of copper (Cu) in Khyber and Mohmand districts ( 1.92 mg/l), while the highest concentration (0.0029 mg/l) of cadmium (Cd) was measured in the water of Orakzai district. Therefore, based on comparison to WHO and EPA standard values, this study shows that the water of all tribal districts is safe for drinking water purposes

show abstract

Climate change extreme and seasonal toxic metal occurrence in Romanian freshwaters in the last two decades—case study and critical review

Cited by 29 publications

References 53 publications

Assessing the Health Risk and the Metal Content of Thirty-Four Plant Essential Oils Using the ICP-MS Technique

Assessing the Health Risk and the Metal Content of Thirty-Four Plant Essential Oils Using the ICP-MS Technique

A Tree Ring Proxy Evaluation of Declining Causes in Pinus sylvestris L. and Pinus nigra J.F. Arnold in Northeastern Romania

Evaluation of Heavy Metals in Drinking Water of Tribal Districts Ex-FATA Pakistan

Contact Info

Product

Resources

About